Curtain rail



FIG. 1 is a perspective view of a curtain rail showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a top plan view thereof showing a portion broken away for ease of illustration;

FIG. 5 is a bottom plan view thereof showing a portion broken away for ease of illustration;

FIG. 6 is a right side elevational view thereof showing a portion broken away for ease of illustration; and,

FIG. 7 is a left side elevational view thereof showing a portion broken away for ease of illustration. 

The ornamental design for a curtain rail, as shown and described. 